Microscopic anatomy of compact bone

Central haversian canal

Contains blood vessels and nerves.

Osteon

Haversian system
A structural unit of compact bone consisting of a central canal surrounded by concentric cylindrical lamellae of matrix.

Circumferential Lamallae

extend around the entire circumference of the diaphysis and effectively resist twisting of the long bone

Lamellae

Weight-bearing, column like matrix tubes

Periosteum

Periosteal blood vessel

H

Perforating Sharpey's fibers

Endosteum lining bony canals and covering trabeculae

Perforating Volkmann's canal

At right angles to the central canal. Connects bloods vessels and nerves to the periosteum and central canal

Lacunae

small cavities that contain osteocytes

Canaliculi

hairlike canals that connect lacunae to each other and the central canal

Trabeculae

Align along lines of stress, no osteons, Contain irregularly arranged lamellae, osteocytes and canaliculi. Capillaries in endosteum supply nutrients

Osteogenic cells

stem cells in periosteum and endosteum that give rise to osteoblasts

Osteoblasts

Bone-forming cells. (responsible for bone growth)

Osteocytes

Mature bone cells that monitors and maintains the mineralized bone matrix.

Osteoclast

Bone-resorbing cell. (cells that break down (resorb) bone matrix)